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 * regarding copyright ownership.  The ASF licenses this file   *
 * to you under the Apache License, Version 2.0 (the            *
 * "License"); you may not use this file except in compliance   *
 * with the License.  You may obtain a copy of the License at   *
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 * software distributed under the License is distributed on an  *
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
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package org.apache.james.user.api;

import jakarta.inject.Inject;

import org.apache.james.core.Username;
import org.reactivestreams.Publisher;

import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;

public class DelegationUserDeletionTaskStep implements DeleteUserDataTaskStep {
    private final DelegationStore delegationStore;

    @Inject
    public DelegationUserDeletionTaskStep(DelegationStore delegationStore) {
        this.delegationStore = delegationStore;
    }

    @Override
    public StepName name() {
        return new StepName("DelegationUserDeletionTaskStep");
    }

    @Override
    public int priority() {
        return 1;
    }

    @Override
    public Publisher<Void> deleteUserData(Username username) {
        return removeDelegatedUsers(username)
            .then(removeDelegatingUsers(username));
    }

    private Mono<Void> removeDelegatedUsers(Username username) {
        return Flux.from(delegationStore.delegatedUsers(username))
            .concatMap(delegator -> (delegationStore.removeAuthorizedUser(delegator, username)))
            .then();
    }

    private Mono<Void> removeDelegatingUsers(Username username) {
        return Flux.from(delegationStore.authorizedUsers(username))
            .concatMap(delegatee -> (delegationStore.removeAuthorizedUser(username, delegatee)))
            .then();
    }
}
